3Com OfficeConnect Ethernet Hub 16C User Manual page 15

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Refer to Figure 5 below to compare the wiring of a
straight-through and a crossover cable.
Figure 5
Straight-through Cable/Crossover Cable
Normal
Pin
Pin
port
1
1
Rx+
2
2
Rx-
3
3
Tx+
4
4
5
5
6
6
Tx-
7
7
8
8
Uplink
Normal
Pin
Pin
port
port
1
1
Rx-
Rx+
2
2
Rx+
Rx-
3
3
Tx-
Tx+
4
4
5
5
6
6
Tx+
Tx-
7
7
8
8
Normal
port
Rx+
Rx-
Tx+
Tx-
15

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